A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

Could anyone give me a refresher? How do you find the line of intersection in a 3x3 system of equations?

  • This Question is Closed
  1. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    same as a ...what a miute, thats a matrix aint it

  2. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    elimination is still the same process....

  3. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    if you know 3 points, you can solve for a 3x3

  4. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    No, because it's a LINE of intersection, not a point.

  5. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    right, the three planes interesect at a line instead of a point.

  6. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    if you look at it head on its 3 lines at a single point if I recall correctly. kinda like a churro :)

  7. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Lol... or an asterisk? But, I still need the line itself, not just a point.

  8. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    we got any examples to muddle thru?

  9. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    if you have a system of three equations (in three variables i'm guessing), they can intersect at a point or a line.

  10. amistre64
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    solving quadratics by just the points is finding a solution to 3 planes that come to a point... :)

  11. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    if they intersect in a line, you get infinite solutions, so you should be able to just parameterize the solution from rref your matrix.

  12. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Isn't there a way to do it without reduced row echelon form?

  13. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    rref is the most simple way that i know.

  14. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    you may not have to reduce it all the way.

  15. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    if you can notice by inspection that one eq. is a linear combo. of the other.

  16. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.